The relationships among sCOD, VFAs, microbial community, and biogas production during anaerobic digestion of rice straw pretreated with ammonia

Xiaoyu Zuo; Hairong Yuan; Akiber Chufo Wachemo; Xitong Wang; Liang Zhang; Juan Li; Hongliang Wen; Jiaxi Wang; Xiujin Li

doi:10.1016/j.cjche.2019.07.015

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The relationships among sCOD, VFAs, microbial community, and biogas production during anaerobic digestion of rice straw pretreated with ammonia

Energy, Resources and Environmental Technology | Updated：2026-01-06

- The relationships among sCOD, VFAs, microbial community, and biogas production during anaerobic digestion of rice straw pretreated with ammonia
- The relationships among sCOD, VFAs, microbial community, and biogas production during anaerobic digestion of rice straw pretreated with ammonia
- 中国化学工程学报（英文版） 2020年28卷第1期页码：286-292
- Affiliations：
  
  1. Department of Environmental Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology,Beijing,China,100029
  2. Department of Water Supply and Environmental Engineering, Arba Minch University, P. O. Box 21, Arba Minch,Ethiopia
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.07.015
  中图分类号：
- 纸质出版：2020
- Accepted：
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Xiaoyu Zuo, Hairong Yuan, Akiber Chufo Wachemo, 等. The relationships among sCOD, VFAs, microbial community, and biogas production during anaerobic digestion of rice straw pretreated with ammonia[J]. 中国化学工程学报（英文版）, 2020,28(1):286-292.

Xiaoyu Zuo, Hairong Yuan, Akiber Chufo Wachemo, Xitong Wang, Liang Zhang, Juan Li, Hongliang Wen, Jiaxi Wang, Xiujin Li. The relationships among sCOD, VFAs, microbial community, and biogas production during anaerobic digestion of rice straw pretreated with ammonia[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 286-292.
Xiaoyu Zuo, Hairong Yuan, Akiber Chufo Wachemo, 等. The relationships among sCOD, VFAs, microbial community, and biogas production during anaerobic digestion of rice straw pretreated with ammonia[J]. 中国化学工程学报（英文版）, 2020,28(1):286-292. DOI： 10.1016/j.cjche.2019.07.015.

Xiaoyu Zuo, Hairong Yuan, Akiber Chufo Wachemo, Xitong Wang, Liang Zhang, Juan Li, Hongliang Wen, Jiaxi Wang, Xiujin Li. The relationships among sCOD, VFAs, microbial community, and biogas production during anaerobic digestion of rice straw pretreated with ammonia[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 286-292. DOI： 10.1016/j.cjche.2019.07.015.

摘要

Abstract

This study investigated the effects of soluble chemical oxygen demand (sCOD)

volatile fatty acids (VFAs)

and microbial community on biogas production in the process of rice straw (RS) anaerobic digestion (AD). The results showed that the sCOD concentrations and VFA production appeared the same trend

which was inversely related with that of daily biogas production. The cumulative methane yield of RS was 194.9 ml·(g VS)

-1

. The modified Gompertz model is the best fit for measured methane yields of RS in the three kinetic models of first-order kinetic

Cone and modified Gompertz.

Firmicutes

Bacteroidetes

and

Euryarchaeota

were the dominant microbial phyla throughout AD process. At the genus level

the microorganisms mainly composed of

Clostridium

Vadin

Terrisporobacter

Methanosaeta

Methanobacterium

and

Methanosarcina

Proteiniphilum

showed strong relationship with sCOD and VFA production.

Clostridium

and

Terrisporobacter

displayed relationship with biogas production. Therefore

in order to improve the stability of the AD system

the para

meter changes of VFAs

sCOD

and biogas yield were monitored in the RS AD process. The study can provide theoretical basis for improving the efficiency of RS AD.

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